cadence: Add LSO support.

New Cadence GEM hardware support Large Segment Offload (LSO):
TCP segmentation offload (TSO) as well as UDP fragmentation
offload (UFO). Support for those features was added to the driver.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
index 1216950c97d1..d67adad67be1 100644
--- a/drivers/net/ethernet/cadence/macb.h
+++ b/drivers/net/ethernet/cadence/macb.h
@@ -382,6 +382,10 @@
 #define GEM_TX_PKT_BUFF_OFFSET                  21
 #define GEM_TX_PKT_BUFF_SIZE                    1
 
+/* Bitfields in DCFG6. */
+#define GEM_PBUF_LSO_OFFSET                     27
+#define GEM_PBUF_LSO_SIZE                       1
+
 /* Constants for CLK */
 #define MACB_CLK_DIV8                           0
 #define MACB_CLK_DIV16                          1
@@ -414,6 +418,10 @@
 #define MACB_CAPS_SG_DISABLED                   0x40000000
 #define MACB_CAPS_MACB_IS_GEM                   0x80000000
 
+/* LSO settings */
+#define MACB_LSO_UFO_ENABLE                     0x01
+#define MACB_LSO_TSO_ENABLE                     0x02
+
 /* Bit manipulation macros */
 #define MACB_BIT(name)                                  \
         (1 << MACB_##name##_OFFSET)
@@ -545,6 +553,12 @@ struct macb_dma_desc {
 #define MACB_TX_LAST_SIZE                       1
 #define MACB_TX_NOCRC_OFFSET                    16
 #define MACB_TX_NOCRC_SIZE                      1
+#define MACB_MSS_MFS_OFFSET                     16
+#define MACB_MSS_MFS_SIZE                       14
+#define MACB_TX_LSO_OFFSET                      17
+#define MACB_TX_LSO_SIZE                        2
+#define MACB_TX_TCP_SEQ_SRC_OFFSET              19
+#define MACB_TX_TCP_SEQ_SRC_SIZE                1
 #define MACB_TX_BUF_EXHAUSTED_OFFSET            27
 #define MACB_TX_BUF_EXHAUSTED_SIZE              1
 #define MACB_TX_UNDERRUN_OFFSET                 28